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JP5389311B2 |
A signal processing device includes a converting unit, a filtering unit, a differential computing unit, and a phase difference computing unit. The converting unit samples two alternating signals with a predetermined period and converts t...
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JP2013250231A |
To quickly and highly accurately detect a phase difference between two AC signals.A phase difference operation part calculates a phase difference φr(=φ2-φ1) of two detected voltages v1(phase angle φ1), v2(phase angle φ2). After oper...
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JP5322391B2 |
To provide a terminal tool for detecting a voltage phase that can obtain high measurement precision irrespective of a size or a shape of an insulation electrical wire of an electrical path of which the voltage phase is to be measured in ...
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JP5268969B2 |
To provide a digital test plug available for both CTT and PTT, and capable of preventing unexpected accidents, such as, electrical shocks and measuring electric power, and so on. The digital test plug includes: common conductors 24, disp...
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JP5255930B2 |
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JP5217075B2 |
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JP5214163B2 |
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JP5188449B2 |
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JP5181427B2 |
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JP5165712B2 |
A high performance phase detector includes a local digital oscillator for generating a digital reference signal of programmable frequency and phase. The phase detector accumulates a difference in phase between the digital reference signa...
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JP5154594B2 |
A high performance phase detector includes a local digital oscillator for generating a digital reference signal of programmable frequency and phase. The phase detector accumulates a difference in phase between the digital reference signa...
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JP5119291B2 |
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JP5103840B2 |
The specific phase position detection circuit detects first and second temporal positions which have respective desired phase offsets from an upper peak position and an lower peak position of an analog signal having periodicity. The spec...
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JP5103710B2 |
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JP5092490B2 |
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JP5076730B2 |
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JP5055016B2 |
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JP5022545B2 |
To calculate the phase difference between two signal waveforms under test having the same period, even with waveform distortions, without using the FFT operation. For arithmetically obtaining the phase difference between at least two sig...
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JP5006190B2 |
The technology relates to detecting the wiring phase of an unknown phase voltage relative to a reference phase voltage in an electric power distribution system having a polyphase power line. In order to reliably detect the wiring phase a...
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JP4973498B2 |
A phase difference measuring device according to this invention has an object of shortening the measuring time, and includes a plurality of phase difference measuring circuits (104, 105, 106) formed in a row, and phase difference convers...
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JP4920357B2 |
To detect the leakage current caused by insulation resistance to the ground. The leakage current detection device comprises a leakage current detection part for detecting the leakage current from a measuring wireway; an amplifying part f...
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JP4887322B2 |
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JP2012026738A |
To give means for performing binary phase detection with a high signal-to-noise ratio for a feeble micro wave signal.In the state where a signal desired to detect is inputted to a resonator, the resonator is parametric-oscillated. By uti...
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JP4833775B2 |
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JP2011242211A |
To provide a phase difference measuring device capable of continuously and stably measuring the phase difference between two input signals in a range of 0 to 360 degrees.A phase difference is calculated by subjecting two input signals R ...
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JP2011208975A |
To provide a device for detecting a phase angle difference of a power system capable of detecting accurately a voltage phase angle difference between optional nodes in the power system easily without requiring complicated calculation.A t...
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JP4771572B2 |
On a semiconductor device 20, fabricated are a VCO 10A, an frequency divider by integer R 21, a frequency divider by integer (PxN+A) 22 wherein each of P, N and A is an integer, A is variable and A
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JP4773078B2 |
A device for measuring voltage, including a voltage detecting portion for detecting a plurality of voltages and outputting a maximum voltage of the plurality of voltages, a voltage latching portion that receives a first output from the v...
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JP4766434B2 |
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JP4767907B2 |
To provide a transformer tester for accurately and rapidly measuring an electronic transformer. This transformer tester is used for comparing the secondary output of a tested transformer structured as an electronic transformer with the s...
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JP4765100B2 |
A phase measurement device measures an output of an amplifier when an input signal having input frequency components is fed to the amplifier, and includes multipliers for orthogonally transforming the output of the amplifier a phase acqu...
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JP2011169625A |
To quickly and accurately detect a phase difference between two signals.The phase difference detection device 1, for detecting a phase difference between detection signals S1 and S2, includes a signal detection part 2 detecting the detec...
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JP4761724B2 |
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JP4723652B2 |
A phase difference detector for detecting a phase difference between input clocks which both have a same first frequency, including: a pulse width conversion unit for converting the input clocks into a phase difference signal indicating ...
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JP2011122907A |
To notify a user of erroneous connection intelligibly, even in the case of an inexpensive segment type liquid crystal or 7-segment LED which is a main current of an electronic indicating instrument.This instrument includes a measuring op...
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JP4688390B2 |
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JP4681731B2 |
A self compensating phase detector. Using two identical phase detectors introducing one of the phase detectors and a controlled variable phase shifter in a negative feedback loop shifts one dock signal enough such that the shifted signal...
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JP4667918B2 |
The method involves performing, at instants regularly distributed within a time interval, a sequence of detections of a signal state. A count variable is increased in a sequence of count variables or left unchanged based on the state. Th...
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JP4656652B2 |
When a signal having two or more frequency components is fed to a circuit to be measured, a phase of the signal output from the circuit to be measured is measured. A phase measurement device measures an output when an input signal having...
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JP4657151B2 |
The rotation phase angle measuring device measures a voltage instantaneous value of an electric power system in a period of 1/(4 N) of one period of a reference wave and integrates voltage amplitude of a squared value of the voltage inst...
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JP4628096B2 |
Good device PASS/FAIL determination is realized by measuring timings of a cross point of differential clock signals CLK and a data signal DATA output from a DUT, and obtaining a relative phase difference between both signals. A semicondu...
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JP4593993B2 |
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JP2010258605A |
To provide a pulse detector which generates a sample hold signal and holds a signal level of a high-frequency signal even though the attenuation of the signal level is slow when a load having a high Q value to generate plasma is connecte...
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JP2010212929A |
To provide a PLL performance measuring device accurately evaluating a PLL circuit.A moving average for a phase error detected in a phase locked loop circuit is obtained. On the basis of the comparison of the moving average and a threshol...
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JP4513077B2 |
There is provided a method and an apparatus for detecting a delay fault in a phase-locked loop circuit. A frequency impulse is applied to the PLL circuit under test as a reference clock, and a waveform of a signal outputted from the PLL ...
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JPWO2008126240A1 |
Using the real-time frequency and voltage instantaneous value time series data, the voltage instantaneous value time series estimation data and the current voltage estimation value are calculated by the least squares method. The calculat...
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JP2010151781A |
To provide a frequency estimation method for shortening a processing time while being low in calculation load, and to provide a frequency estimation device, a surface shape measurement method, and a surface shape measurement device. The ...
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JP4473218B2 |
The present invention discloses a method for measuring the operating state of synchronous motor by using composite power angle meter, the method comprising steps of: a) obtaining various signals of the synchronous motor and its system; b...
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JP4436065B2 |
To provide a phase measuring apparatus for detecting the phase difference between transmission units by wireless, and to provide a cosmic solar generation system using the apparatus. In the phase measuring apparatus applied to the system...
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JP4398198B2 |
To specify a region in which the insulation in current flowing wires or cables is deteriorated. Resistance leakage current Ir of the cable 2 is detected by the clamping-type current transformer 13 and the AC cable ground point detector 4...
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